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* Copyright (c) 2005 Jakub Jermar
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef KERN_ia64_CONTEXT_H_
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#define KERN_ia64_CONTEXT_H_
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#include <arch/types.h>
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#include <arch/register.h>
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#include <arch/stack.h>
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* context_save_arch() and context_restore_arch() are both leaf procedures.
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* No need to allocate scratch area.
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* One item is put onto the stack to support get_stack_base().
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#define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
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/* RSE stack starts at the bottom of memory stack. */
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#define context_set(c, _pc, stack, size) \
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(c)->pc = (uintptr_t) _pc; \
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(c)->bsp = ((uintptr_t) stack) + ALIGN_UP((size), REGISTER_STACK_ALIGNMENT); \
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(c)->ar_pfs &= PFM_MASK; \
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(c)->sp = ((uintptr_t) stack) + ALIGN_UP((size), STACK_ALIGNMENT) - SP_DELTA; \
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* Only save registers that must be preserved across
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* Application registers
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uint64_t ar_unat_caller;
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uint64_t ar_unat_callee;
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uintptr_t bsp; /* ar_bsp */
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uintptr_t sp; /* r12 */
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uintptr_t pc; /* b0 */
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* Predicate registers
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uint128_t f2 __attribute__ ((aligned(16)));